Hitkansut LLC v. United States
127 Fed. Cl. 101
Fed. Cl.2016Background
- Plaintiffs (Hitkansut LLC and Acceledyne) assert Ms. Donna Walker’s U.S. Patent No. 7,175,722 (the ’722 patent) covering a thermo‑oscillatory/thermo‑magnetic method; three claims (1, 6, 11) remained for trial after earlier rulings on patent eligibility and §112.
- Government (Oak Ridge/DOE) denies infringement and asserts invalidity (laws of nature, obviousness, enablement) and non‑use of claimed Larson‑Miller selection and “oscillatory” energy.
- Multiple discovery and scheduling orders regulated fact and expert discovery; parties exchanged expert reports with a gap between close of fact discovery and expert disclosures.
- Plaintiffs moved in limine on multiple discovery and evidentiary grounds (untimely prior art and data, expert disclosures, estoppel, and Daubert challenges to Dr. Druschitz); government moved to exclude an undisclosed fact witness (Michael Walker).
- The court resolved seven in limine motions: it denied most plaintiff motions (including striking prior art, estoppel, and Daubert challenges to Dr. Druschitz) and denied the government’s motion to exclude Michael Walker, but granted admission of designated deposition testimony subject to trial objections.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| 1) Late disclosure of additional prior art (June 2015) | Government’s additions were untimely under scheduling and RCFC 26 and prejudicial | Disclosures occurred before gov’t invalidity expert report and before plaintiffs’ responsive reports; no prejudice | Denied — supplementation justified/harmless given timing and expert discovery window |
| 2) September 2015 amendment to government financial data | Amendment to pre‑Dec‑2013 figures was untimely and prejudicial | Change was minor and caused by post‑2013 events; harmless | Denied — untimely but harmless and justified (small $ discrepancy) |
| 3) Exclusion of Dr. Druschitz’s non‑infringement and invalidity testimony (Daubert) | His reports are methodologically flawed: did not analyze all claim elements, omitted sources, and misunderstood burdens | He is a qualified materials scientist; rebuttal expert need only address elements defendant disputes; omissions remedied in later reports; burden knowledge not required | Denied — opinions admissible; omissions cured; expertise and methods adequate for rebuttal role |
| 4) Preclusion/estoppel re: Oak Ridge experiment data withheld in discovery | Government previously argued data irrelevant; plaintiffs seek adverse inference/estoppel if government later relies on absence of data | Government’s trial position does not assert absence of data proves non‑infringement; prior denial of plaintiffs’ motion to compel renders estoppel inappropriate | Denied — judicial estoppel inapplicable and plaintiffs’ prior motion to compel was decided on timeliness/cumulativeness |
Key Cases Cited
- Daubert v. Merrell Dow Pharms., 509 U.S. 579 (1993) (trial judge must assess admissibility and qualifications for expert testimony)
- O2 Micro Int’l Ltd. v. Monolithic Power Sys., 467 F.3d 1355 (Fed. Cir. 2006) (timing and scope of contention discovery in patent cases)
- New Hampshire v. Maine, 532 U.S. 742 (2001) (judicial estoppel doctrine)
- Scott Timber, Inc. v. United States, 93 Fed. Cl. 221 (2010) (factors for RCFC 26/37 supplementation sanctions analysis)
- Warner‑Jenkinson Co. v. Hilton Davis Chem. Co., 520 U.S. 17 (1997) (patent infringement requires proof of every claimed element)
- Freedman Seating Co. v. American Seating Co., 420 F.3d 1350 (Fed. Cir. 2005) (burden on patentee to prove each claim element)
- Graham v. John Deere Co., 383 U.S. 1 (1966) (framework for obviousness analysis)